Writing-machine cylinder.



H. STRONGSON.

WRITING MACHINE CYLINDER. APPLICATION FILED MAR-1.1917.

1,242,071., Patented Oct. 2,1917.

I I II Q I I &

. Q I f I I I I I m\ I RP I I O3 I a I Q 1 I I i@- -I 3 1% m WITNESSES. I l INVENTOR A TTORNEYS NTE E% ATT FTQ HERMAN STRONGSON, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO ROBERT F.

GREACEN, OF NEW YORK, N. Y.

WRITING-MACHINE CYLINDER.

Specification of Letters Patent.

Patented-flat. 2, 1917.

Application filed March 1, 1917. Serial No. 151,687.

To all whom it may concern:

Be it known that I, HERMAN STRoNosoN,

a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Writing-Machine Cylinder, of which the following is a. full, clear, and exact description.

Among the principal objects which the present invention has in view are: to provide a noiseless tubular cylinder for machines of the character mentioned; to pro vide means for varying the rigidity of the surface of said cylinder; and to provide means for accommodating the cylinder to the work being performed on a typewriter equipped with'the cylinder herein described.

2 Drawings.

the mounting shaft therefor.

Description.

As seen in the drawings, the present cylinder employs a tube 9. The tube 9 is preferably formed of rubber and has'relatively thickened walls. The ring terminals 10 with whichthe tube is provided are integrally formed with the body of the tube but are treated to harden the same. The ring terminals 10 serve as attaching members for uniting the tube 9 with the end closure disks 11 and 12. To this end the ring terminals are bored at suitable intervals to receive the screws 13. The threads of the screws engage the tapped holes provided therefor. The disks 11 and 12 are both supported on the shaft 14. The shaft 14 is rotatively mounted in bearings 15 which are provided in the frame 16 of,the writing machine.

The shaft 14 has reduced ends, the junction of one thereof with the main body of the shaft forms an abutment 17.

At the opposite end of the body portion, a screw-threaded section 18 is formed. The threads of the section 18 engage threads in the disk 12. The disk 11 is rotatively mounted on the reduced end of the shaft 14 adjacent the abutment 17. The result of this construction is that when the shaft 14 is held non-rotatively and the cylinder is rotated, the disk 12 and parts connected therewith are moved to and from the ends of the section 18, thereby lengthening and shortening the cylinder or tube 9. It is obvious that as the tube 9 is stretched lengthwise, the surface thereof becomes more rigid or harder. Therefore, by holding the shaft 14 by means of the milled hand-knobs 19, the operator of the typewriting machine may rotate the cylinder to increase or diminish the length and rigidity thereof.

As shown best in Fig. 3 of the drawings, the cylinder is provided with a line-spacing ratchet wheel 20, said wheel being structurally connected by means of the screws 21 with the disk 11. The wheel 20, like the disk 11, is rotatively mounted on the shaft 14 to permit rotation of the cylinder and spacing wheel independently of the shaft 14. The frictional engagement of the shaft 14 with the disk 11, wheel 20, and disk 12, is sufficient, however, to enable the operator of the typewriting machine to shift the paper by the usual means of rotating the cylinder, using for that purpose the knobs 19.

While I have herein disclosed as the preferred construction for elongating the tube 9, the screw-threaded section 18 and threaded disk 12 operatively engaging the same, it will be understood that I may employ a variety of well-known means for moving the disk 12 lengthwise of the shaft 14. Therefore, it should be understood that it is not the intention to limit the claim to such construction. Y

Claim.

A writing machine cylinder comprising a rubber tube body having integrally formed relatively rigid ring terminal ends; a plurality of supporting disks rigidly connected a screw-thread formed in one of said disks with said ends; a shaft passing centrally for engaging said threaded section of said through said disks and rotatively connected shaft, and an abutment adjacent the other 10 therewith; and means mounted on said end of said shaft for rotatively engaging 5 shaft for moving said disks relative each to to hold in fixed lengthwise disposition the the other, said means embodying a threaded other of said disks. a section adjacent one end of said shaft and HERMAN STRONGSON. 

